title: Discrepancy in results from three guaiacum resin tests.
mesh_terms: D003108:Colonic Diseases / Q000175:diagnosis; D005188:False Negative Reactions; D005189:False Positive Reactions; D005243:Feces / Q000032:analysis; D006138:Guaiac; D006801:Humans; D009780:Occult Blood; D012002:Rectal Diseases / Q000175:diagnosis; D012116:Resins, Plant
chemical_list: D012116:Resins, Plant; D006138:Guaiac